1.Can be seamed along the edge of button and belt, without traces on material surface. 2.Applicable to the seam of handbags, belts, ribbons or straps with buttons or rings. 3. It is fully guaranteed to coincide with the previous stitch hole when locking needle in reverse stitch. 4.Easy positioning fabric, if you need to change width, number of stitches, it can be easily achieved through the control panel. 5.LCD touch-operated controller, 7.5-inch. 6.Automatic thread-break- alarm, break-needle-proof cover and other sweet human-based design. 7. Electromagnetic clamp can be digital-setting the tension of thread clamping.